617131425646 has 4 divisors (see below), whose sum is σ = 925697138472. Its totient is φ = 308565712822.

The previous prime is 617131425641. The next prime is 617131425661. The reversal of 617131425646 is 646524131716.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 617131425596 and 617131425605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617131425641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154282856410 + ... + 154282856413.

It is an arithmetic number, because the mean of its divisors is an integer number (231424284618).

Almost surely, 2^617131425646 is an apocalyptic number.

617131425646 is a deficient number, since it is larger than the sum of its proper divisors (308565712826).

617131425646 is a wasteful number, since it uses less digits than its factorization.

617131425646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308565712825.

The product of its digits is 725760, while the sum is 46.

It can be divided in two parts, 6171314 and 25646, that added together give a triangular number (6196960 = T₃₅₂₀).

The spelling of 617131425646 in words is "six hundred seventeen billion, one hundred thirty-one million, four hundred twenty-five thousand, six hundred forty-six".